/Engine/Source/Runtime/RHI/Public/PipelineFileCache.h
Open the pipeline file cache for the specfied name and platform. If successful, the GUID of the game file will be returned in OutGameFileGuid
static bool OpenPipelineFileCache ( const [FString](API\Runtime\Core\Containers\FString) & Key, const [FString](API\Runtime\Core\Containers\FString) & CacheName, EShaderPlatform Platform, [FGuid](API\Runtime\Core\Misc\FGuid) & OutGameFileGuid )